20155000507 has 2 divisors, whose sum is σ = 20155000508. Its totient is φ = 20155000506.

The previous prime is 20155000483. The next prime is 20155000511. The reversal of 20155000507 is 70500055102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20155000507 - 2²⁷ = 20020782779 is a prime.

It is not a weakly prime, because it can be changed into another prime (20159000507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10077500253 + 10077500254.

It is an arithmetic number, because the mean of its divisors is an integer number (10077500254).

Almost surely, 2^20155000507 is an apocalyptic number.

20155000507 is a deficient number, since it is larger than the sum of its proper divisors (1).

20155000507 is an equidigital number, since it uses as much as digits as its factorization.

20155000507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1750, while the sum is 25.

Adding to 20155000507 its reverse (70500055102), we get a palindrome (90655055609).

The spelling of 20155000507 in words is "twenty billion, one hundred fifty-five million, five hundred seven", and thus it is an aban number.